Wristwatch type wireless telephone

ABSTRACT

To provide a wristwatch type wireless telephone improved in terms of handling in that there is no need to change the holding state of the wristwatch type wireless telephone when the wristwatch type wireless telephone is used for telephone conversation by being removed from an arm and held in a hand. In a wristwatch type wireless telephone carried by being worn on an arm by binding with an arm band, a sound radiating hole of a mouthpiece and a sound receiving hole of an ear piece are formed in a surface at a back surface, at the arm side in a state of being worn on an arm.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] This invention relates to a wristwatch type wireless telephone,and more particularly, to a wristwatch type wireless telephone having awireless telephone function such as that of the PHS (Personal HandyphoneSystem).

[0003] 2. Description of the Prior Art

[0004] Wireless telephones such as the PHS, include a wristwatch typewireless telephone having a wristwatch-like shape and having its armband equivalent to a wristwatch band fitted about an arm of a user whencarried (Japanese Patent Application Laid-Open Publication Nos. Hei.2-257739 and Hei 11-177663). In the conventional wristwatch typewireless telephone, each of a display portion, operating buttons, asound radiating hole of a mouthpiece, and a sound receiving hole of anearpiece is formed in a surface to be the front side opposite from thearm side in a state where the wireless telephone is worn about an arm,so that the wireless telephone can be used for telephone conversationeven in a state of being worn about an arm.

[0005] The conventional wristwatch type wireless telephone can be usedfor telephone conversation in a state of being worn about an arm, sinceeach of its display portion, its operating buttons, the sound radiatinghole of its mouthpiece, and the sound receiving hole of its earpiece isformed in the surface to be the front side opposite from the arm side ina worn-on-arm state. However, in a state the wireless telephone is wornabout one's arm, it is difficult to hold the wireless telephonepositioned to maintain the sound radiating hole of the mouthpiece in thevicinity of the mouth and the sound receiving hole of the earpiece inthe vicinity of the ear. In some situations, therefore, it is preferableto remove the wristwatch type wireless telephone from the arm and tohold the wristwatch type wireless telephone in the hand during telephoneconversation.

[0006] However, when the conventional wristwatch type wireless telephoneis removed from the arm, the front surface side thereof faces the palmside of the hand and a need arises to temporarily shift the wristwatchtype wireless telephone as from the right hand to the left hand, or toturn wristwatch type wireless telephone in the palm in order that thesound radiating hole of the mouthpiece and the sound receiving hole ofthe earpiece may correspond to (face) the vicinity of the mouth and thevicinity of the ear, since the conventional wristwatch type wirelesstelephone has each of its display portion, operating buttons, the 'soundradiating hole of its mouthpiece, and the sound receiving hole of itsearpiece formed in the surface to be the front side opposite from thearm side in a worn-on-arm state, thus making the operation troublesome.In particular, shifting the wireless telephone from one hand to theother, cannot be done with one hand, and is inconvenient in a situationwhere only one hand can be used while the other hand is holdingsomething, such as a brief case.

[0007] In addition, a waterproofing film made from a porous fluorideresin etc. is stuck over the sound receiving hole and the soundradiating hole with a need to protect those holes from the infiltrationof a drop of water while securing its breathability. This waterproofingfilm is usually protected by a protective sheet made of metal or resinin a mesh-like or a fiber-like state. However, in electronic equipmentused for a mobile use such as wireless telephone, the protective sheet,the sound radiating hole, or the sound receiving hole is clogged withdust or dirt of a hand during the use of the equipment. Therefore, thereis a problem in that the transmission of a sound is hindered. In thesecases, we often come across such a scene that the general consumersremove the dust or dirt of a hand by using a peg such as a toothpick.However, the insertion of such a peg may damage the protective film.

SUMMARY OF THE INVENTION

[0008] The present invention has been made to solve the problemsdescribed above, and therefore has a primary object to provide awristwatch type wireless telephone improved in terms of handling so thatthere is no need to change the holding state of the wristwatch typewireless telephone when the wristwatch type wireless telephone isremoved from the arm and used for telephone conversation by being heldin a hand. Further, a secondary object of the invention is to provide awristwatch type wireless telephone in which sound holes such as a soundradiating hole and a sound receiving hole is hardly clogged with dust ordirt of a hand, and in addition, a third object of the invention is toproved a wristwatch type wireless telephone in which a waterproofingfilm is hardly damaged.

[0009] To achieve the above-described objects, according to the presentinvention, there is provided a wristwatch type wireless telephonecarried by being detachably worn on an arm by binding with an arm band,and having a sound radiating hole of a mouthpiece and a sound receivinghole of an earpiece formed in a surface to be a back surfacecorresponding to an arm side in a worn-on-arm state.

[0010] In this arrangement, when the wristwatch type wireless telephoneis removed by one hand from the arm, it can be held in the same handwithout being shifted from the held position, and the sound radiatinghole of the mouthpiece and the sound receiving hole of the earpiece arethereby positioned on the side opposite from the palm of the hand, sothat the sound radiating hole of the mouthpiece and the sound receivingholes of the earpiece correspond to (face) the vicinity of the mouth andthe vicinity of the ear, thereby enabling telephone conversation.

[0011] Further, in the wristwatch type wireless telephone in accordancewith this invention, a display portion and operating buttons are formedin a surface to be a front side opposite from the arm side in aworn-on-arm state.

[0012] Still further, in the wristwatch type wireless telephone inaccordance with this invention, a holder portion for detachably holdinga body of the wristwatch type wireless telephone is formed in the armband, the sound radiating hole of the mouthpiece and the sound receivinghole of the earpiece are formed in a back surface side of the body, andthe body can be attached to and detached from the arm band by a handoperation.

[0013] Yet further, in the wristwatch type wireless telephone inaccordance with this invention, the body of the wristwatch type wirelesstelephone has a flexible structure portion at the intermediate portion,and the shape of the body may be deformed between a curved bent shapeand a flat shape by the flexible operation of the flexible structureportion.

[0014] Moreover, in the wristwatch type wireless telephone in accordancewith this invention, the sound radiating hole of the mouthpiece and thesound receiving hole of the earpiece are formed in the arm band at theback surface side of the same.

[0015] Further, in the wristwatch type wireless telephone according tothe present invention, the hole boring direction of the sound holesprovided to the wristwatch type wireless telephone body and the verticaldirection with respect to the face of the waterproofing sheet forpreventing the sound devices from the water, which are provided insidethe wristwatch type wireless telephone body have such a relationshipthat they are substantially at right angles at a part or at a whole partthereof. As a result, the sound holes are positioned other than theportion on the arm side of the body. For this reason, the sound holesare hardly clogged with dust and dirt of a hand.

[0016] Further, even if the peg enters from the sound hole side, it doesnot abut against the waterproofing sheet, thereby being capable ofpreventing the waterproofing sheet from braking. In the sound holes,from a short hole of a thin portion to a long hole of a thicker portionare included therein. However, particularly, by enlarging the length ofthe sound hole, it can, further prevent the peg from reaching thewaterproofing sheet. Note that, in the sound holes described above, notonly the sound radiation hole of the mouthpiece and the sound receivinghole of the earpiece, but also various holes for alarm are includedtherein. In addition, the sound radiating device and the sound receivingdevice are included in the sound device. For example, the speakers andmicrophones etc. are enumerated as the sound radiation device and thesound receiving device, respectively. Besides, by providing thewaterproofing sheet for preventing the sound device from a water, and byproviding the sound holes to the wristwatch type wireless telephone bodyor to the side face of the arm band, the similar functional effectdescribed above may be obtained.

[0017] Further, in the wristwatch type wireless telephone according tothe present invention, an obstacle body is provided between the soundhole and a waterproofing sheet, which are provided to the wristwatchtype wireless telephone body. As a result, even if the peg entersthrough the sound holes, the insertion of the peg is regulated at aposition to some extent with the obstacle body. With this, it can beprevented the peg from reaching the waterproofing sheet, with the resultthat the breakage of the waterproofing sheet can be prevented.

[0018] Further, in the wristwatch type wireless telephone according tothe present invention, a second sound hole is provided to the front sideof the wristwatch type telephone body, and the second sound hole and thewaterproofing sheet for protecting the sound devices from the water, arearranged while shifting their positions in a plane direction. As aresult, even if the peg enters from the second sound hole, it does notabut against the waterproofing sheet. For this reason, the breakage ofthe waterproofing sheet can be prevented. In addition, provision of thesecond sound hole enables the volume of the sound to be large, and ifnecessary, it enables sending or receiving conversation from the frontside of the body.

BRIEF DESICRIPTION OF THE DRAWINGS

[0019] A preferred form of the present invention is illustrated in theaccompanying drawings in which:

[0020]FIG. 1 is a perspective view of Embodiment 1 of a wristwatch typewireless telephone in accordance with this invention;

[0021]FIG. 2 is a perspective view in the direction of arrow A in FIG.1;

[0022]FIG. 3 is a perspective view of Embodiment 2 of the wristwatchtype wireless telephone in accordance with this invention;

[0023]FIG. 4 is a perspective view in the direction of arrow B in FIG.3;

[0024]FIG. 5 is a perspective view in the direction of arrow B in FIG.3, showing a state where the wireless telephone body is in a flat shape;

[0025]FIG. 6 is a perspective view of Embodiment 3 of the wristwatchtype wireless telephone in accordance with this invention;

[0026]FIG. 7 is a diagram illustrating an example of use of thewristwatch type wireless telephone according to Embodiment 3.

[0027]FIG. 8 ia a cross-sectional view of Embodiment 4 of the wristwatchtype wireless telephone in accordance with this invention;

[0028]FIG. 9 is a cross-sectional view taken along the line A-A of FIG.8;

[0029]FIG. 10 is a cross-sectional view of a modified example of thewristwatch type wireless telephone shown in FIG. 8;

[0030]FIG. 11 is a cross-sectional view of a modified example of thewristwatch type wireless telephone shown in FIG. 8;

[0031]FIG. 12 is a cross-sectional view of a modified example of thewristwatch type wireless telephone shown in FIG. 8; and

[0032]FIG. 13 is a cross-sectional view of Embodiment 5 of thewristwatch type wireless telephone in accordance with this invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Embodiments of the wristwatch type wireless telephone in thisinvention will be described below in detail with reference to theaccompanying drawings.

[0034] (Embodiment 1)

[0035]FIGS. 1 and 2 show Embodiment 1 of the wristwatch type wirelesstelephone in accordance with this invention. This wristwatch typewireless telephone has a wireless telephone body 1. Arm band halfmembers 4 and 5 that are substantially C-shaped and may be opened andclosed are connected to opposite sides of the wireless telephone body 1by hinge structure portions 2 and 3. The wireless telephone isdetachably worn on an arm of a user by binding with the arm band halfmembers 4 and 5.

[0036] The wireless telephone body 1 has a surface 1A to be the frontsurface opposite from the arm side in the state of being worn on the armby binding with the arm band half members 4 and 5, in which a displayportion 6 formed by a liquid crystal display panel having statusindications necessary for the wireless telephone and capable ofdisplaying information, time, etc., and operating buttons 7 forinputting data necessary for the wireless telephone and for performingselection, setting, etc. are provided.

[0037] Also, in the wireless telephone body 1, a surface 1B to be theback surface, i.e., the arm side in the state of being worn on the armby binding with the arm band half members 4 and 5, a sound radiatinghole 9 of a mouthpiece 8 and sound receiving holes 11 of an earpiece 10for a wireless telephone are formed. The sound radiating hole 9 and thesound receiving holes 11 are formed apart from each other so as tocorrespond to the vicinity of the mouth and the vicinity of the ear,respectively for telephone conversation by a wireless telephone. In thisembodiment, the sound radiating hole 9 is formed close to one hingestructure portion 3 while the sound receiving holes 11 are formed closeto the other hinge structure portion 2 opposite from the hinge structureportion 3.

[0038] The wristwatch type wireless telephone constructed as describedabove is detachably worn on one arm, e.g., the left arm of a user bybinding with the arm band half members 4 and 5.

[0039] When the wireless telephone is used, the user operates theoperating buttons 7 to perform dialing and call processing whilewatching indications on the display portion 6 in the worn-on-arm state.Thereafter, the user holds the wireless telephone body 1 in the righthand and removes the wristwatch type wireless telephone from the arm, byopening the arm band half members 4 and 5. When the wireless telephonebody 1 is held in the right hand, the display portion 6 and theoperating buttons 7 are positioned on the right hand palm side while thesound radiating hole 9 of the mouthpiece 8 and the sound receiving holes11 of the earpiece 10 are positioned on the side opposite from the righthand palm.

[0040] Therefore, while the wristwatch type wireless telephone is beingheld in the hand used to remove the wireless telephone body 1 from thearm, i.e., the right hand, without being shifted from the held position,and while the sound radiating hole 9 of the mouthpiece 8 and the soundreceiving holes 11 of the earpiece 10 are being positioned on the sideopposite from the palm of the hand, in such state the entire wristwatchtype wireless telephone is brought close to the cheek, so that the soundradiating hole 9 of the mouthpiece 8 and the sound receiving holes 11 ofthe earpiece 10 correspond to (face) the vicinity of the mouth and thevicinity of the ear, thus enabling telephone conversation by a one-handoperation.

[0041] Note that, in the above-described telephone conversation state,the arm band half members 4 and 5 are largely opened by the hingestructure portions 2 and 3, as shown in FIG. 2, thereby avoiding beingencumbered with the arm band half members 4 and 5 during telephoneconversation.

[0042] (Embodiment 2)

[0043]FIGS. 3 through 5 show Embodiment 2 of the wristwatch typewireless telephone in accordance with this invention. This wristwatchtype wireless telephone has a wireless telephone body holder portion 21,and arm band half members 24 and 25 that are substantially C-shaped andmay be opened and closed are connected to opposite sides of the wirelesstelephone body holder portion 21 by hinge structure portions 22 and 23.

[0044] A holder recess portion 26 is formed in the wireless telephonebody holder portion 21, and a wireless telephone body 27 is detachablyfitted in the holder recess portion 26. That is, the wireless telephonebody 27 is detachably held in the holder recess portion 26 and togetherwith the wireless telephone body holder portion 21 is detachably worn onan arm of a user by binding with the arm band half members 24 and 25.

[0045] In the wireless telephone body 27, a surface (outer surface) 27Ato be the front side opposite from the arm side in the state of beingworn on the arm by being fitted in the holder recess portion 26 of thewireless telephone body holder portion 21 and by binding with the armband half members 24 and 25, are provided with a display portion 28formed by a liquid crystal display panel having status indicationsnecessary for the wireless telephone and capable of displayinginformation, time, etc., and operating buttons 29 for inputting datanecessary for the wireless telephone and for performing selection,setting, etc.

[0046] Also, in the wireless telephone body 27, a surface 27B (a bottomsurface facing a bottom surface of the holder recess portion 26) to bethe back side, on the arm side in the above-described state of beingworn on the arm by binding with the arm band half members 24 and 25, asound radiating hole 31 of a mouthpiece 30 and sound receiving holes 33of an earpiece 32 for a wireless telephone are formed. Also in thiscase, the sound radiating hole 31 and the sound receiving holes 33 areformed apart from each other so as to correspond to the vicinity of themouth and the vicinity of the ear, respectively for telephoneconversation by a wireless telephone.

[0047] A switch hole 34 is formed in the surface 27B of the wirelesstelephone body 27. When the wireless telephone body 27 is fitted in theholder recess portion 26 of the wireless telephone body holder portion21, a projection 35 formed in the holder recess portion 26 is fitted inthe switch hole 34, to thereby automatically effect a change from thecommunication state to a communication-terminated state.

[0048] In the wireless telephone body 27, a portion 36 in which thedisplay portion 28 and the sound receiving holes 33 of the received 32are provided, and a portion 37 in which the operating buttons 29 and thesound radiating hole 31 of the mouthpiece 30 are provided, are formedseparately from each other. The portions 36 and 37 are connected by aflexible structure portion 38 at the intermediate portion and can bemoved by the flexing operation of the flexible structure portion 38, soit may be deformed between a curved bent shape such as shown in FIG. 4and a flat shape such as shown in FIG. 5.

[0049] In the wristwatch type wireless telephone constructed asdescribed above, the wireless telephone body 27 is fitted in the holderrecess portion 26 of the wireless telephone body holder portion 21, anddetachably worn on one arm of a user, e.g., the left arm by binding withthe arm band half members 24 and 25.

[0050] When the wireless telephone is used, the user operates theoperating buttons 29 to perform dialing and call processing whilewatching indications on the display portion 28, in the above-describedworn-on-arm state. Thereafter, the user takes the wireless telephonebody 27 with the right hand and pulls out the wireless telephone body 27from the holder recess portion 26. In the state where the wirelesstelephone body 27 is taken with the right hand and pulled out from theholder recess portion 26, the display portion 28 and the operatingbuttons 29 are positioned on the right hand palm side, while the soundradiating hole 31 of the mouthpiece 30 and the sound receiving holes 33of the earpiece 32 are positioned on the side opposite from the righthand palm.

[0051] Therefore, while the wristwatch type wireless telephone body 27is being held in the hand used to pull it out from the holder recessportion 26 of the wireless telephone body holder portion 21, i.e., theright hand, without being shifted from the holding position, and whilethe sound radiating hole 31 of the mouthpiece 30 and the sound receivingholes 33 of the earpiece 32 are being positioned on the side oppositefrom the palm of the hand, the wireless telephone body 27 is broughtclose to the cheek, so that the sound radiating hole 31 of themouthpiece 30 and the sound receiving holes 33 of the earpiece 32correspond to (face) the vicinity of the mouth and the vicinity of theear, thus enabling telephone conversation by a one-hand operation.

[0052] After the completion of telephone conversation, the wirelesstelephone body 27 is fitted in the holder recess portion 26 of thewireless telephone body holder portion 21 to be returned to the originalworn state. When the wireless telephone body 27 is returned to theoriginal worn state, the projection 35 formed in the holder recessportion 26 is fitted in the switch hole 34, to thereby automaticallyeffect a change from the communication state to thecommunication-terminated state.

[0053] Note that, the wireless telephone body 27 can be carried alone,in a removed state from the wireless telephone body holder portion 21.The wireless telephone body holder portion 21 is curved such as to befitted to the arm shape, and the holder recess portion 26 is also curvedcorrespondingly. Accordingly, the wireless telephone body 27 has acurved bent shape such as shown in FIG. 4 when fitted in the holderrecess portion 26. However, when carried alone, the wireless telephonebody 27 can have a flat shape such as shown in FIG. 5 by virtue of theflexible operation of the flexible structure portion 38, so that it canbe put in a pocket of a garment or the like without being bulky.

[0054] With this, both the fitting of the wireless telephone body 27 tothe arm band and the compactness of the wireless telephone body 27 whenthe it is carried alone can be held compatibly.

[0055] Besides, under a state where the wireless telephone body 27 isfitted in the holder recess portion 26 of the wireless telephone bodyholder portion 21, it is possible for the fitting portions of thewireless telephone body 27 and the holder recess portion 26 to have asealing effect such that the side of the surface 27B of the wirelesstelephone body 27 is waterproofed, thereby protecting the soundradiating hole 31 of the mouthpiece 30 and the sound receiving holes 33of the earpiece 32 from being permeated with liquid droplets.

[0056] Note that, attachment or detachment of the wireless telephonebody 27 to or from the holder recess portion 26 may be based on asliding method, a turning method, or the like. Any method may suffice aslong as prevention of coming-off and attachment/detachment in asingle-motion are achieved. It is also possible for the wirelesstelephone body holder portion 21 to incorporate a click-stop mechanism,a spring type pop-up mechanism, a button-operated spring ejectmechanism, or the like.

[0057] In each of the above-described embodiments, the display portion 6or 28, and the operating buttons 7 or 29 may be formed in the surface inwhich the sound radiating hole 9 or 31 of the mouthpiece 8 or 30 and thesound receiving holes 11 or 33 of the earpiece 10 or 32 are formed,instead of being formed in the front surface side, or may be formed inboth surfaces.

[0058] (Embodiment 3)

[0059]FIG. 6 shows Embodiment 3 of the wristwatch type wirelesstelephone in accordance with this invention. Further, in FIG. 6,portions corresponding to those in FIG. 1 are indicated by the samereference numerals. The description for the corresponding portions willbe omitted.

[0060] In this embodiment, arm band half members 4 and 5 have a flexiblestructure such that they may be reversed, as indicated by the imaginaryline in FIG. 6. A mouthpiece 8 is embedded in a tip end portion of onearm band half member 5, and its sound radiating hole 9 is opened in theback surface side of the arm band half member 5. An earpiece 10 isembedded in a tip end portion of the other arm band half member 4, and asound receiving hole 11 is opened in the back surface side.

[0061] The mouthpiece 8 and the earpiece 10 are electrically connectedto a control circuit or the like (not shown in the figure) provided inthe wireless telephone body 1 by internal wirings 12 and 13 embedded inthe arm band half members 4 and 5.

[0062] Also in this embodiment, when the wireless telephone is used, auser operates the operating buttons 7 to perform dialing and callprocessing, while watching indications of the display portion 6, in theworn-on-arm state. Thereafter, the user holds the wireless telephonebody 1 in the right hand, removes the wristwatch type wireless telephonefrom the arm by opening the arm band half members 4 and 5, and reversingthe arm band half members 4 and 5. In this state of the wirelesstelephone body 1 being held in the right hand, the display portion 6 andthe operating buttons 7 are positioned on the right hand palm side,while the sound radiating hole 9 of the mouthpiece 8 and the soundreceiving holes 11 of the earpiece 10 are positioned on the sideopposite from the right hand palm as shown in FIG. 7.

[0063] Therefore, while the wristwatch type wireless telephone is beingheld in the hand used to remove the wireless telephone body 1 from thearm, i.e., the right hand, without being shifted from the holdingposition, and while the sound radiating hole 9 of the mouthpiece 8 andthe sound receiving holes 11 of the earpiece 10 are being positioned onthe side opposite from the palm of the hand, in such state the entirewristwatch type wireless telephone is brought close to the cheek, sothat the sound radiating hole 9 of the mouthpiece 8 and the soundreceiving holes 11 of the earpiece 10 correspond to (face) the vicinityof the mouth and the vicinity of the ear, thus enabling telephoneconversation by a one-hand operation. Moreover, the sound radiating hole9 of the mouthpiece 8 is located at the tip end of the arm band halfmember 5, and the sound receiving holes 11 of the earpiece 10 arelocated at the tip end of the other arm band half member 4, that is, thetwo groups of holes are distanced from each other, the sound radiatinghole 9 of the mouthpiece 8 being positioned in the vicinity of themouth, the sound receiving holes 11 of the earpiece 10 being easilypositioned in a natural position in the vicinity of the ear, thus, theuser can easily perform a telephone conversation.

[0064] (Embodiment 4)

[0065]FIGS. 8 and 9 show Embodiment 4 of the wristwatch type wirelesstelephone in accordance with this invention. The wristwatch typewireless telephone according to this embodiment has a characteristic ina waterproofing structure of the sound radiating hole portion and thesound receiving hole portion described in Embodiments 1 to 3. Thiswristwatch type wireless telephone has a structure in which a speaker 41of the earpiece 10 is provided into the wireless telephone body 1 havinga flat shape, and a resonance room 42 is formed in front to the speaker41. Between the speaker 41 and the resonance room 42 is partitioned by alib 42 a, and a waterproofing film 43 is provided to the openingthereof.

[0066] As the waterproofing film 43, existing materials having amoisture permeability, for example, Microtech, Goretex, Microweather(Trademarks in each case), or the like, preferably used. In particular,usually, these waterproofing film 43 are widely used for a rain wear,ski ware, and the like, and have a merit in that not only having awaterproofing function, but also have a function to radiate watermoisture within the body to the outside, as well as a high strength. Aknown speaker such as a dynamic speaker or PZT may be used for thespeaker 41.

[0067] Besides, provided both sides of the wireless telephone body 1 arethe resonance room 42 and sound radiation holes 44 communicating withoutside. The hole boring direction of the sound radiation holes 44 andthe vertical direction with respect to the face of the waterproofingfilm 43 have such a relationship that they are substantially rightangled. Further, the shape of the sound radiation holes 44 may have acircle or a rectangular shape, and is set as a dimension which canprevent dust from clogging. Specifically, the diameter of the soundradiation hole is preferably set to 2 mm or more. Further, it isneedless to say that the hole forming positions and the number of boredholes may appropriately be changed from a view of the sound radiatingeffect. In addition, in order for the sound radiating holes 44themselves to have a waterproofing effect to some extent, the dimensionof the hole may be set so that the water hardly invades the inside dueto the surface tension of water. Note that the sound radiating hole maybe provided not only both sides of the wireless telephone body 1, butalso to only one side or an upper side surface of the body (not shown).Also, an obstacle body 45 having a projecting plate-like shape isprovided in the vicinity of the sound radiating holes 44, for preventinga bar-like or a needle-like peg from entering. Note that the shape ofthe obstacle body 45 is not limited to a projecting plate-like shape,but may be a semi-spherical or quadrangle column-like projection.

[0068] With taking such a structure, a waterproofing structure may beprovided to the wristwatch type wireless telephone, as well as dust ordirt of a hand hardly enters into the sound radiating holes 44, becausethe sound radiating holes 44 are provided on both sides. Therefore, itcan be prevented that sound becomes hardly outgo, because the soundradiating holes 44 are clogged with dust etc. Further, the waterproofingfilm 43 is provided so as to face with internal wall faces 42 b of theresonance room 42, and therefore, even the peg from outside may enter,it does not reach the waterproofing film 43, thereby being capable ofpreventing the waterproofing film 43 from being damaged. For thisreason, even if the sound radiating holes 44 are clogged with dust, itcan be cleaned by a peg such as a toothpick. In addition, thewaterproofing film 43 does not abut against the arm directly, andtherefore, stains do not adhere thereonto. A mesh-like protective memberis not needed to be provided in the front face of the waterproofingfilm, and therefore water is not accumulated in the mesh, with theresult that it does not cause an obstruction to transfer the sound.

[0069] Note that, in the embodiments described above, if the obstaclebody 45 is omitted, substantially same effect can be obtained. Inaddition, the above-mentioned structure may be adopted not only to theearpiece 10, but also to a sound radiating hole or the mouthpiece 8 (inthis case, a microphone is provided in place of the speaker 41) of asound radiating device for announcing an arrival of a call or anelectronic mail. Also, the above-mentioned structure may be adopted notonly to the wireless telephone body 1, but also to the arm band bodies 4and 5.

[0070]FIG. 10 shows a modified example of the wristwatch type wirelesstelephone described above. Like this, the obstacle body 45 is omitted toform a sound radiating hole 46 in long, with the result that it can beprevented the bar-like or needle-like pegs from entering into the insideof the wireless telephone body 1. Also, the sound radiation hole 46 ismade long, with the result that the invasion of water can further beprevented. In addition, by boring the sound radiating hole 46 a in aslant, the direction along which the bar-like peg enters, may beregulated, thereby being capable of preventing the peg from contactingwith the waterproofing film 43 (shown by a dotted line in the figure).

[0071] Besides, as shown in FIG. 11, a projecting portion 47 with awidth smaller than the wireless telephone body 1 is formed on topthereof, and a sound radiating hole 48 may provided on the side surfaceof the projecting portion 47. The obstacle body 45 may be omitted. Withtaking this structure, in addition to obtain the same effect as above,an exit of the sound radiating hole 48 may be disposed at a relativelyclose position from ear. As a result, it is possible to hear the soundfrom the earpiece 10 more easily. In addition, as shown in FIG. 12, alib 49 in the wireless telephone body 1, onto which the waterproofingfilm 43 is adhered, may be formed so as to extend largely insidethereof. In such a structure, the lib 49 becomes an obstacle body, withthe result that it is capable of preventing the peg from the soundradiating hole from contacting with the waterproof film.

[0072] (Embodiment 5)

[0073]FIG. 13 shows Embodiment 5 of the wristwatch type wirelesstelephone in accordance with this invention. The wristwatch typewireless telephone according to this embodiment is characterized in thata second sound radiating hole 51 is provided in the waterproofingstructure of the earpiece portion described in Embodiment 4, and thestructure other than the above is similar to that in Embodiment 4.Therefore, description of the same structure is omitted. In thiswristwatch type wireless telephone, a resonance room 52 is provided tothe surface thereof, and speaker holes 54 are formed, too, so as toescape a supporting portion 53 for supporting a driver portion 41 a ofthe speaker 41. Waterproofing films 55 similar to the above are adheredonto those speaker holes 54.

[0074] Besides, the second sound radiating hole 51 is provided to therear surface of the wireless telephone body 1, and the second soundradiating hole 51 are bored while shifting the position with the speakerholes 54. Therefore, even if the bar-like or needle-like peg enters fromthe second sound releasing hole 51, the waterproof film 55 does notsuffer from a damage. Further, the dimension of the second soundreleasing hole 51 is preferable set as 2 mm or more similar to that ofsound radiating hole 44. In addition, a quadrangle or triangle shape maybe employed other than a circle. Note that the second sound radiatinghole 51 may be provided on the side surface of the body 1 similar to thesound radiating hole 44 (not shown).

[0075] According to this wristwatch type wireless telephone inaccordance with Embodiment 5 of the present invention, the sound at theback surface of the speaker 41 can be outgone, thereby being capable ofincreasing the volume of the sound. Besides, in the case where onlymonitoring is performed without communicating by voice, the sound can beheard from the surface side of the wireless telephone body 1. Note that,it is needless to say that the second sound radiating hole 51 mayappropriately be changed as the sound radiating hole 44 in Embodiment 44described above.

[0076] As described above, in the wristwatch type wireless telephone inaccordance with this invention, the sound radiating hole of themouthpiece and the sound receiving holes of the earpiece are formed inthe surface to be the back surface, at the arm side in the state ofbeing worn on an arm by binding with the arm band. Therefore, when thewristwatch type wireless telephone is removed from the arm by one hand,it can be held in the same hand without being shifted from the holdingposition, and the sound radiating hole of the mouthpiece and the soundreceiving holes of the earpiece are thereby positioned on the sideopposite from the palm of the hand, so that the sound radiating hole ofthe mouthpiece and the sound receiving holes of the earpiece correspondto the vicinity of the mouth and the vicinity of the ear. Thus, thewireless telephone of this invention is improved in terms of handling.

[0077] Also, in the wristwatch type wireless telephone in accordancewith this invention, the display portion and the operating buttons areprovided in the surface to be the front side opposite from the arm sidein the state of being worn on an arm. Therefore, it is possible toconfirm receiving conditions and to perform call operations, i.e.,dialing, with improved visibility and operability.

[0078] Also, in the wristwatch type wireless telephone in accordancewith this invention, the holder portion for detachably holding the bodyof the wristwatch type wireless telephone is formed in the arm band, andthe body of the wristwatch type wireless telephone can be attached ordetached from the arm band by a hand operation. Therefore, only the bodyof the wristwatch type wireless telephone can be removed from the armband side without removing the arm band from the arm, thereby enablingtelephone conversation with improved operability.

[0079] Also, in the wristwatch type wireless telephone in accordancewith this invention, the shape of the body of the wristwatch typewireless telephone may be deformed between a curved bent shape and aflat shape by the flexible operation of the flexible structure portion,thereby ensuring ease of fitting to the arm band as well as certaincompactness when the body of the wristwatch type wireless telephone iscarried alone.

[0080] Also, in the wristwatch type wireless telephone in accordancewith this invention, the sound radiating hole of the mouthpiece and thesound receiving holes of the earpiece are respectively formed in theback surface side of the arm band. The two groups of holes are therebydistanced from each other, so that the sound radiating hole of themouthpiece is positioned in the vicinity of the mouth and the soundreceiving holes of the earpiece are easily positioned in the vicinity ofthe ear, thereby enabling telephone conversation in a natural position.

[0081] Further, in the wristwatch type wireless telephone according tothe present invention, the hole boring direction of the sound holesprovided to the wristwatch type wireless telephone body and the verticaldirection with respect to the face of the waterproofing sheet forpreventing the sound devices from the water, which are provided insidethe wristwatch type wireless telephone body have such a relationshipthat they are substantially at right angles at a part or at a whole partthereof, with the result that the sound holes are positioned other thanthe portion on the arm side of the body, and therefore the sound holesare hardly clogged with dust and dirt of a hand. Further, even if thepeg enters from the sound hole, it does not abut against thewaterproofing sheet, thereby being capable of preventing thewaterproofing sheet from braking.

[0082] Further in the wristwatch type wireless telephone according tothe present invention, by providing the waterproofing sheet forpreventing the sound device from a water, and by providing the soundholes to the wristwatch type wireless telephone body or to the side faceof the arm band, the sound holes is hardly clogged with dust and dirt ofa hand, and even if the peg enters from the sound hole, it can beprevented the waterproofing sheet from braking.

[0083] Further, in the wristwatch type wireless telephone according tothe present invention, an obstacle body is provided between the soundhole and a waterproofing sheet, which are provided to the wristwatchtype wireless telephone body, with the result that even if the pegenters through the sound holes, the breakage of the waterproofing sheetcan be prevented.

[0084] Further, in the wristwatch type wireless telephone according tothe present invention, a second sound hole is provided to the front sideof the wristwatch type telephone body, and the second sound hole and thewaterproofing sheet for protecting the sound devices from the water, arearranged while shifting their positions in a plane direction, with theresult that, even if the peg enters from the second sound hole, it doesnot abut against the waterproofing sheet, and therefore the breakage ofthe waterproofing sheet does not occur. In addition, provision of thesecond sound hole enables the volume of the sound to be large, and ifnecessary, it enables sending or receiving conversation from the frontside of the body.

What is claimed is:
 1. A wristwatch type wireless telephone comprising:a sound radiating hole of a mouthpiece being formed in a surface to be aback side corresponding to an arm side in a worn-on-arm state; and asound receiving hole of an earpiece being formed in a surface to be aback side corresponding to an arm side in a worn-on-arm state.
 2. Awristwatch type wireless telephone as set forth in claim 1 , furthercomprising: a display portion being formed in a surface to be a frontside opposite from the arm side in a worn-on-arm state; and operatingbuttons being formed in a surface to be a front side opposite from thearm side in a worn-on-arm state.
 3. A wristwatch type wireless telephoneas set forth in claim 1 , further comprising: a holder portion todetachably hold a body of the wristwatch type wireless telephone beingformed in an arm band; wherein the sound radiating hole of themouthpiece and the sound receiving hole of the earpiece are formed in aback surface side of the body, and the body can be attached to anddetached from the arm band by a hand operation.
 4. A wristwatch typewireless telephone as set forth in claim 2 , further comprising: aholder portion to detachably hold a body of the wristwatch type wirelesstelephone being formed in an arm band; wherein the sound radiating holeof the mouthpiece and the sound receiving hole of the earpiece areformed in a back surface side of the body, and the body can be attachedto and detached from the arm band by a hand operation.
 5. A wristwatchtype wireless telephone as set forth in 3, further comprising: aflexible structure portion at an intermediate portion thereof the bodyof the wristwatch type wireless telephone; wherein the shape of the bodymay be deformed between a curved bent shape and a flat shape by theflexible operation of the flexible structure portion.
 6. A wristwatchtype wireless telephone as set forth in 4, further comprising: aflexible structure portion at an intermediate portion thereof the bodyof the wristwatch type wireless telephone; wherein the shape of the bodymay be deformed between a curved bent shape and a flat shape by theflexible operation of the flexible structure portion.
 7. A wristwatchtype wireless telephone as set forth in claim 1 , wherein the soundradiating hole of the mouthpiece and the sound receiving hole of theearpiece are formed in the back side of the arm band.
 8. A wristwatchtype wireless telephone as set forth in claim 2 , wherein the soundradiating hole of the mouthpiece and the sound receiving hole of theearpiece are formed in the back side of the arm band.
 9. A wristwatchtype wireless telephone as set forth in claim 1 , wherein hole boringdirections of the sound radiation hole of the mouthpiece and the soundreceiving hole of the earpiece which are provided to the wristwatch typewireless telephone body, and a vertical direction with respect to a faceof waterproofing sheet for protecting a sound radiating device and asound receiving device which are arranged inside the wristwatch typewireless telephone, have such a relationship that they are substantiallyat right angles with each other at a part or at a whole thereof.
 10. Awristwatch type wireless telephone as set forth in claim 1 , wherein thewaterproofing sheet to protect a sound radiating device and a soundreceiving device which are arranged inside the wristwatch type wirelesstelephone, is provided, and the sound radiation hole of the mouthpieceand the sound receiving hole of the earpiece are provided to thewristwatch type wireless telephone body, or to a side surface portion ofthe arm band.
 11. A wristwatch type wireless telephone as set forth inclaim 1 , further comprising: an obstacle body being provided betweenthe sound hole and a waterproofing sheet, which are provided to thewristwatch type wireless telephone body.
 12. The wristwatch typewireless telephone as set forth in claim 9 , further comprising: asecond sound hole being provided to the front side of the wristwatchtype telephone body; wherein the second sound hole and the waterproofingsheet to protect the sound radiating device and sound receiving devicefrom the water, are arranged while shifting their positions in a planedirection.
 13. The wristwatch type wireless telephone as set forth inclaim 10 , further comprising: a second sound hole being provided to thefront side of the wristwatch type telephone body; wherein the secondsound hole and the waterproofing sheet to protect the sound radiatingdevice and sound receiving device from the water, are arranged whileshifting their positions in a plane direction.
 14. The wristwatch typewireless telephone as set forth in claim 11 , further comprising: asecond sound hole being provided to the front side of the wristwatchtype telephone body; wherein the second sound hole and the waterproofingsheet to protect the sound radiating device and sound receiving devicefrom the water, are arranged while shifting their positions in a planedirection.